Each year you choose: take the payout as cash, or leave it with Great Eastern to earn interest. The interest rate is set by Great Eastern, is not guaranteed and can change without notice.
Great Eastern's illustration assumes 3.00% a year on payouts left in when the fund earns 4.25%, and 1.50% a year when it earns 3.00%.
If you are thinking of ending the policy, ask Great Eastern for a statement that shows the surrender value and any payouts you have left in, as separate figures.